Antiskidding tire.



E. PSHALL. ANTI K DING TIRE.

FILED APR. 20, 190

' Patented Apr. 6, 1909.

P EN

ELEAZER KEMPSHALL,

or LONDON, ENGLAND.

anr'rrsnnnme TIRE.

To all whom it may concern:

Be it known that I, ELEAZER KE rsHAIlL, citizenof the United States of America, and residing at the Hotel Russell, Russell Square, 5 London, W. Ce, England, have invented certain new anduseful Improvements in Antiskidding Tires, of which the following is *a specification. 1

Pneumatic tires which, have thickeneg tread portions, and sides or'barrel'portion which gradually taperin thickness toward the rim or felly, 'are admittedly advantageous as compared with tires which are of equal thickness throughout, or substantially so, especially for automobiles. -But I have found that the heavy 'treadfcauses great stress to be thrown on the relatively weak side portions so as to'frequently break the latter down. When the tread surface of such a tire is formed with recesses which act as suction chambers when coming in contact with the road and when there is a tendency to skid that is-resis'ted by the suction chambers, there is still gr'eatertendency the tire downalong its weak sides.

The object of the present invention is to provide means for increasing the strength of the barrel portion of the tire and also to increase the cooling effect when running, and

of the circular studs in the form of ribs which extend around the 'barr portion of the tire tapering oil toward the beaded or other rim portion where they mergeinto the tire itself. 1 Of the accompanying drawings which illustrate the tire constructed according to this invention'Figure 1 represents a cross-section, Fig, 2 a plan, and Fig. 3 a side-elevation of a tire constructed in accordance with.

40 my invention.

tire having a thick tread portion a and side or barrel portions 9 which taper in thickness away from the tread, has its tread surface formed with a series of circular studs 1) connected by intermediate; ortions c and also provided with recesses" The portions of, the studs 12 which form the sides of the re- Specification of Letters Patent.

Applicationflled April 20, 1908. Seriai No. 423,276,. r

to break the invention consists in continuing the sides.

In carrying out. the invention a pneumatic Patented April 6,-1 .909.

cesses dare continued or extended in the form of ribs e which taper off toward their ends f Where they merge into the barrel portion of the tire g near the beaded or other edge h. These ribs e not only greatly strengthen the barrel portion 9 of the tire,

but their thick ends reinforce the walls of the suction recesses and they also offer considerable surface to the air during the running of the wheel and prevent the tire becoming over-heated. Another advantage of the ribs 0, is that they distribute the stress of pressure from the thick tread to the thinner sides in substantial proportion to the taperingthickness of the side walls g, so that tendency of k the thin portions to break down is overcome, and this without altering therelative resilience ofdififerent portions of the tire,

Having now described my invention, what' I claim is t t r I 1. A pneumatic tire having a thick tread stantia y as and for fore set forth.

2 .-A pneumatic tire comprising a thick the purpose hereinbeness away/from the tread, the surface of the v tread having a series of studs 6 connected by intermediate ortions c and having recesses d, the sides oi the tire having ribs e forming tapering toward their ends f nearjthe edges of the tire, substantially as and for the purpose hereinbefore set forth..

testimony whereof I have vsigned two subscribing witnesses.

ELEAZER ,KE PSI LAIL.

Witnesses: i

A.MATHYS,

' H Mar'mnws 1 portion and sides which taper in thickness away from the'tread, the surface of the tread f laterall strengtheningthe'tread studs, subtread portionand sides which taper in thickextensions of the sides of said studs, said-ribs name to this specification in the presence of 

